ensure that startDate and endDate are preserved keys. these come from react (#19111)
ensure that startDate and endDate are preserved keys. these come from react (#19111)

* ensure that startDate and endDate are preserved keys. these come from react

* remove unused typedefs

zhouyx/amphtml,cory-work/amphtml,ampproject/amphtml,ampproject/amphtml,BenDz/amphtml,lannka/amphtml,BenDz/amphtml,smartadserver/amphtml,nexxtv/amphtml,koshka/amphtml,widespace-os/amphtml,alanorozco/amphtml,yandex-pcode/amphtml,src-code/amphtml,jpettitt/amphtml,zhouyx/amphtml,honeybadgerdontcare/amphtml,Gregable/amphtml,BenDz/amphtml,nexxtv/amphtml,smartadserver/amphtml,nexxtv/amphtml,dotandads/amphtml,zhouyx/amphtml,smartadserver/amphtml,jpettitt/amphtml,koshka/amphtml,adup-tech/amphtml,ampproject/amphtml,sebastianbenz/amphtml,tlong2/amphtml,widespace-os/amphtml,laterpay/amphtml,sebastianbenz/amphtml,techhtml/amphtml,jridgewell/amphtml,ampproject/amphtml,ampproject/amphtml,cvializ/amphtml,erwinmombay/amphtml,danielrozenberg/amphtml,rsimha-amp/amphtml,lannka/amphtml,koshka/amphtml,Gregable/amphtml,yandex-pcode/amphtml,jpettitt/amphtml,yandex-pcode/amphtml,voyagegroup/amphtml,nexxtv/amphtml,Gregable/amphtml,jmadler/amphtml,koshka/amphtml,prateekbh/amphtml,jpettitt/amphtml,tlong2/amphtml,src-code/amphtml,zhangsu/amphtml,erwinmombay/amphtml,techhtml/amphtml,techhtml/amphtml,mhc-gh/amphtml,media-net/amphtml,prateekbh/amphtml,widespace-os/amphtml,BenDz/amphtml,BenDz/amphtml,media-net/amphtml,jpettitt/amphtml,tlong2/amphtml,adup-tech/amphtml,tlong2/amphtml,jmadler/amphtml,voyagegroup/amphtml,laterpay/amphtml,jmadler/amphtml,tlong2/amphtml,jridgewell/amphtml,prateekbh/amphtml,rsimha-amp/amphtml,Gregable/amphtml,media-net/amphtml,jmadler/amphtml,media-net/amphtml,src-code/amphtml,sharethrough/amphtml,alanorozco/amphtml,src-code/amphtml,dotandads/amphtml,cvializ/amphtml,nexxtv/amphtml,ampproject/amphtml,cory-work/amphtml,yieldbot/amphtml,voyagegroup/amphtml,sebastianbenz/amphtml,jridgewell/amphtml,techhtml/amphtml,honeybadgerdontcare/amphtml,tlong2/amphtml,zhangsu/amphtml,cory-work/amphtml,mhc-gh/amphtml,sharethrough/amphtml,cory-work/amphtml,voyagegroup/amphtml,smartadserver/amphtml,lannka/amphtml,voyagegroup/amphtml,danielrozenberg/amphtml,honeybadgerdontcare/amphtml,yandex-pcode/amphtml,taboola/amphtml,honeybadgerdontcare/amphtml,lannka/amphtml,Gregable/amphtml,erwinmombay/amphtml,alanorozco/amphtml,adup-tech/amphtml,zhouyx/amphtml,prateekbh/amphtml,cory-work/amphtml,laterpay/amphtml,jridgewell/amphtml,zhangsu/amphtml,Gregable/amphtml,jpettitt/amphtml,media-net/amphtml,BenDz/amphtml,sharethrough/amphtml,honeybadgerdontcare/amphtml,ampproject/amphtml,adup-tech/amphtml,smartadserver/amphtml,danielrozenberg/amphtml,alanorozco/amphtml,laterpay/amphtml,media-net/amphtml,cory-work/amphtml,prateekbh/amphtml,src-code/amphtml,zhouyx/amphtml,danielrozenberg/amphtml,cvializ/amphtml,media-net/amphtml,jmadler/amphtml,cvializ/amphtml,voyagegroup/amphtml,widespace-os/amphtml,mhc-gh/amphtml,honeybadgerdontcare/amphtml,zhouyx/amphtml,erwinmombay/amphtml,rsimha-amp/amphtml,zhangsu/amphtml,nexxtv/amphtml,Gregable/amphtml,widespace-os/amphtml,alanorozco/amphtml,cvializ/amphtml,adup-tech/amphtml,techhtml/amphtml,zhouyx/amphtml,taboola/amphtml,alanorozco/amphtml,media-net/amphtml,src-code/amphtml,koshka/amphtml,techhtml/amphtml,mhc-gh/amphtml,Gregable/amphtml,taboola/amphtml,yieldbot/amphtml,yieldbot/amphtml,dotandads/amphtml,yieldbot/amphtml,rsimha-amp/amphtml,mhc-gh/amphtml,jridgewell/amphtml,yieldbot/amphtml,jpettitt/amphtml,dotandads/amphtml,dotandads/amphtml,ampproject/amphtml,rsimha-amp/amphtml,jpettitt/amphtml,alanorozco/amphtml,rsimha-amp/amphtml,danielrozenberg/amphtml,sebastianbenz/amphtml,erwinmombay/amphtml,cvializ/amphtml,sharethrough/amphtml,adup-tech/amphtml,zhangsu/amphtml,mhc-gh/amphtml,laterpay/amphtml,jmadler/amphtml,honeybadgerdontcare/amphtml,prateekbh/amphtml,sebastianbenz/amphtml,yandex-pcode/amphtml,danielrozenberg/amphtml,cory-work/amphtml,dotandads/amphtml,smartadserver/amphtml,danielrozenberg/amphtml,lannka/amphtml,mhc-gh/amphtml,taboola/amphtml,taboola/amphtml,laterpay/amphtml,prateekbh/amphtml,alanorozco/amphtml,taboola/amphtml,jridgewell/amphtml,koshka/amphtml,nexxtv/amphtml,sebastianbenz/amphtml,yieldbot/amphtml,mhc-gh/amphtml,rsimha-amp/amphtml,yandex-pcode/amphtml,lannka/amphtml,danielrozenberg/amphtml,zhangsu/amphtml,taboola/amphtml,sharethrough/amphtml,voyagegroup/amphtml,sharethrough/amphtml,yandex-pcode/amphtml,lannka/amphtml,widespace-os/amphtml,jridgewell/amphtml,erwinmombay/amphtml